SA3497WE
Installation of Wright, R-1820-71, -60 GR1820G-202A; 702C9CC1, 2, 3, 4; 704C9GC1, 2, 3, 4 engines and Hamilton Standard 4D350 and 33D50 constant speed propeller. (S2R RESTRICTED CATEGORY). Held by Serv-Aero Engineering INC, which holds 32 approved modifications in all. Last revised May 22, 1980. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Ayres Corporation
- Models
- S2R
- Type certificate
- A4SW
- On this site
- Ayres Corporation S-2 244 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 5, 2026.